Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers
Abstract In the current study, cryoconite samples were collected from six glaciers on the Tibetan Plateau to analyze n -alkanes and n -alkenes. The findings revealed that the concentrations of n -alkanes and n -alkenes varied from 40.1 to 496.1 μg g −1 and from 4.6 to 13.8 μg g −1 , respectively. Th...
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Online Access: | http://dx.doi.org/10.1017/jog.2024.23 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143024000236 |
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crcambridgeupr:10.1017/jog.2024.23 2024-05-19T07:43:13+00:00 Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers Li, Quanlian Kang, Shichang Wang, Shijin Wang, Ninglian Wu, Xiaobo Sajjad, Wasim Yang, Huan Li, Yao Wu, Jingquan 2024 http://dx.doi.org/10.1017/jog.2024.23 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143024000236 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-nd/4.0 Journal of Glaciology page 1-9 ISSN 0022-1430 1727-5652 journal-article 2024 crcambridgeupr https://doi.org/10.1017/jog.2024.23 2024-05-02T06:50:53Z Abstract In the current study, cryoconite samples were collected from six glaciers on the Tibetan Plateau to analyze n -alkanes and n -alkenes. The findings revealed that the concentrations of n -alkanes and n -alkenes varied from 40.1 to 496.1 μg g −1 and from 4.6 to 13.8 μg g −1 , respectively. The carbon preference index of the long-chain n -alkanes ranged from 3.3 to 8.4, and the average chain length ranged from 28.7 to 29.3. Moreover, the δ 13 C of the n -alkanes in cryoconites were within the range of C 3 plants, demonstrating that the n -alkanes in cryoconites were only derived from vascular plants. However, the δD mean were more negative than that of C 3 plants, which could be caused by dry and humid conditions of glaciers. Unlike n -alkanes, n -alkenes ranged from C 17:1 to C 30:1 and showed a weak even-over-odd carbon number preference in the Dongkemadi, Yuzhufeng, Laohugou and Tianshan glacier, but a weak odd carbon preference in the Qiyi glacier. The n -alkenes in the YL Snow Mountains showed an obvious odd-over-even carbon number predominance from C 17:1 to C 22:1 with C max at C 19:1 , and the even-over-odd carbon number preference from C 23:1 to C 30:1 with C max at C 28:1 . This demonstrated that the n -alkenes of cryoconites may be mainly derived from in situ production in glaciers. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 1 9 |
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Open Polar |
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Cambridge University Press |
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English |
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Abstract In the current study, cryoconite samples were collected from six glaciers on the Tibetan Plateau to analyze n -alkanes and n -alkenes. The findings revealed that the concentrations of n -alkanes and n -alkenes varied from 40.1 to 496.1 μg g −1 and from 4.6 to 13.8 μg g −1 , respectively. The carbon preference index of the long-chain n -alkanes ranged from 3.3 to 8.4, and the average chain length ranged from 28.7 to 29.3. Moreover, the δ 13 C of the n -alkanes in cryoconites were within the range of C 3 plants, demonstrating that the n -alkanes in cryoconites were only derived from vascular plants. However, the δD mean were more negative than that of C 3 plants, which could be caused by dry and humid conditions of glaciers. Unlike n -alkanes, n -alkenes ranged from C 17:1 to C 30:1 and showed a weak even-over-odd carbon number preference in the Dongkemadi, Yuzhufeng, Laohugou and Tianshan glacier, but a weak odd carbon preference in the Qiyi glacier. The n -alkenes in the YL Snow Mountains showed an obvious odd-over-even carbon number predominance from C 17:1 to C 22:1 with C max at C 19:1 , and the even-over-odd carbon number preference from C 23:1 to C 30:1 with C max at C 28:1 . This demonstrated that the n -alkenes of cryoconites may be mainly derived from in situ production in glaciers. |
format |
Article in Journal/Newspaper |
author |
Li, Quanlian Kang, Shichang Wang, Shijin Wang, Ninglian Wu, Xiaobo Sajjad, Wasim Yang, Huan Li, Yao Wu, Jingquan |
spellingShingle |
Li, Quanlian Kang, Shichang Wang, Shijin Wang, Ninglian Wu, Xiaobo Sajjad, Wasim Yang, Huan Li, Yao Wu, Jingquan Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
author_facet |
Li, Quanlian Kang, Shichang Wang, Shijin Wang, Ninglian Wu, Xiaobo Sajjad, Wasim Yang, Huan Li, Yao Wu, Jingquan |
author_sort |
Li, Quanlian |
title |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_short |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_full |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_fullStr |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_full_unstemmed |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_sort |
distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the tibetan plateau glaciers |
publisher |
Cambridge University Press (CUP) |
publishDate |
2024 |
url |
http://dx.doi.org/10.1017/jog.2024.23 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143024000236 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology page 1-9 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0 |
op_doi |
https://doi.org/10.1017/jog.2024.23 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
9 |
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1799482932897775616 |